<template>
  <div id="app">
    <Header class="visible-lg-block visible-md-block"></Header>
    <router-view />
  </div>
</template>

<script>
import Header from '@/components/header/Header';
export default {
  name: 'App',
  components: {
    Header
  },
  created () {
    // 在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem('store')) {
      this.$store.replaceState(
        Object.assign(
          {},
          this.$store.state,
          JSON.parse(sessionStorage.getItem('store'))
        )
      );
    };

    // 在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener('beforeunload', () => {
      sessionStorage.setItem('store', JSON.stringify(this.$store.state));
    });
  }
};
</script>
<style lang="less">
@import "./styles/reset.less";
</style>
